Malicious PDF — malware analysis report

Static analysis result for SHA-256 1886cbc8bcfb6598…

MALICIOUS

PDF

68.7 KB Created: 2021-01-20 04:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c30a1a2c276a4a5dc39aae07662d3b7a SHA-1: bfc6df98f05687c8e77812628fed03a3c73f936a SHA-256: 1886cbc8bcfb6598e106a69a718f50449cb7938697889e1b3d0ae40bef4e565a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. The embedded URLs are likely used to host malicious content or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffset.ru/123?utm_term=pandora+free+music+apk PDF link annotation
    • https://cdn.sqhk.co/zutujodara/gMmhdOM/93751274816.pdfIn PDF document text
    • https://cdn.sqhk.co/mewowoji/himifLn/asana_app_review.pdfIn PDF document text
    • https://wopopodixela.weebly.com/uploads/1/3/0/9/130969383/dd41d189e1d814.pdfIn PDF document text
    • https://cdn.sqhk.co/kekumumaxow/rOiihjE/poguvix.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/gcjdfQ1/bts_song_quiz_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/ljggigj/legewi.pdfIn PDF document text
    • http://miworusak.iblogger.org/9484398993.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bijamujijupife.epizy.com/bretton_woods_system.pdfIn PDF document text
    • http://sunuwib.epizy.com/autodesk_uninstall_tool_2014.pdfIn PDF document text
    • http://fumibomi.epizy.com/4554945453.pdfIn PDF document text
    • http://sekovukubetib.epizy.com/let_it_be_piano_solo_sheet_music.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B6 5332 bytes
SHA-256: f588a804c504b559b62a595ada98f60cc3ae8615aa63b9c3c60e66df9617e972
font_01_sfnt_off0000e3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CE 10156 bytes
SHA-256: b09ebb625f0cb41f7669a09052ab1e39a7034a36da3cfb8ffbeba0b31fddb7c1